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Protected Membrane Roofing (Stone Ballast)

Protected Membrane Roofing (Stone Ballast)

Typically requires crushed, graded stone placed over a stone filter sheet, rolled out over the insulation. In the field of the roof, a minimum of 10 lbs./s.f. ballast is required, with 20 lbs./s.f. needed at perimeters and at large penetrations. Contact Hydrotech for specific installation guidelines.

View this product at hydrotechusa.com

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